package day07;

import java.nio.channels.Pipe;
import java.util.Random;

public class VerificationCode {
    public static void main(String[] args) {
        String code=generateVeriCode(10);
        System.out.print("验证码为："+code+"\t");
    }
    public static String generateVeriCode(int len){
        String code="";
        String[] chs={"a","b","c","d","e","f","g","h","i","j","k","l","m","n","o","p","q","r","s","t","u","v","w","x","y","z",
                      "A","B","C","D","E","F","G","H","I","J","K","L","M","N","O","P","Q","R","S","T","U","V","W","X","Y","Z",
                      "0","1","2","3","4","5","6","7","8","9"};
        Random ran=new Random();
        for (int i=1;i<=len;i++){
            //int index=(int) (Math.random()*chs.length);随机下标0到chas.length
            int index=ran.nextInt(chs.length);
            code+=chs[index];
        }
        return code;
    }
}
